Brazilian Peppertree Stalk Humdrum Weevil, Apocnemidophorus pipitzi

Brazilian Peppertree Stalk Humdrum Weevil, Apocnemidophorus pipitzi

Inside the The state, in which it was put-out throughout the 1950s, Elizabeth. unguiculus are widely distributed to your Brazilian peppertree, nevertheless the bug appear to is not good enough abundant to severely destroy brand new plant (Yoshioka and you will , individual observance). The fresh ineffectiveness out-of E. unguiculus given that a physiological manage representative about Island destinations could possibly get be owed partly to help you biotic death activities novel to that particular environment. Instance, a couple of wasps which were introduced towards the Their state to have traditional physiological manage of your own sugar cane leafroller Hedylepta (=Omiodes) accepta (Butler) was indeed discover fighting Elizabeth. unguiculus appropriate it was put-out up against Brazilian peppertree (Krauss 1963).

Brand new men and women off An effective

In the event sufficient physical power over Brazilian peppertree by Elizabeth. unguiculus wasn’t attained regarding the Hawaiian archipelago, so it incapacity should not prevent the introduction of the fresh bug on Fl. Episimus unguiculus was a more effective physical manage agent out-of Brazilian peppertree within the Florida as it could well be brought to your an effective new ecosystem in which biotic mortality of introduced and you may indigenous parasitoids and you may predators tends to be faster big compared to The state. Host range research was complete, and you will a release petition try published to the newest Tag inside the (Cuda mais aussi al. 2019). Although not, Tag did not suggest industry release from inside the Florida by the danger of obvious battle having native Episimus spp., in addition to Raleigh dating service prospect of the insect to attack developed pistachio throughout the impractical skills that E. unguiculus emigrated so you’re able to southern California and you can Washington. The chance to nontarget pests and you will vegetation away from Elizabeth. unguiculus would be field examined using the F1 Sterile Bug Method (Cuda 2016). Creation of F1 sterile progeny would-be received by the presenting the parental age group so you can lower amounts of gamma rays (Moeri mais aussi al. 2009). This will assists observations to your survival and perception of one’s F1 larvae into nontarget vegetation significantly less than actual occupation requirements without chance of long lasting business, because the people made out of the fresh new F1 larvae are entirely sterile.

Surveys held has just in the north Argentina (McKay ainsi que al. 2009), and you may southeastern Paraguay found the presence of numerous new absolute foes out of Brazilian peppertree. Among these was a few types of stem bland weevils belonging to new genus Apocnemidophorus Hustache. The latest weevils resemble bird droppings and you may instantaneously drop-off the fresh new herbs when they are disrupted. Grownups out-of Apocnemidophorus pipitzi (Faust) were accumulated from inside the southeastern Paraguay and you may brought in with the a fl containment laboratory in the . Considering Wibmer and you will O’Brien (1986), An effective. pipitzi is indigenous to Argentina, Brazil, and you will Uruguay. A study of weevil specimens deposited on entomology museum regarding the new Government College or university off Parana in Curitiba, Brazil, indicated that collections out-of A great. pipitzi were made in the states away from Parana, Santa Catarina, and you can Minas Gerais. pipitzi into the Paraguay try an alternate country checklist for this species.

The fresh new occurrence out of A great

The brand new people variety in proportions off 4 so you’re able to seven mm inside the size and are usually grayish brown from inside the colour, that have alive specimens have a tendency to lookin even more creamy than simply grayish (Shape 5). A dense spot of white bills is really visible on the corners of your pronotum and that’s shorter obvious toward underside of the instinct. Other parts of muscles provides but a few thrown areas that have light bills. There are also several patches regarding black colored balances along the elytra, that are obviously visible below magnification, supplying the elytra (forewings) a slightly mottled appearance.

pipitzi are conveniently distinguishable. Predicated on C. W. O’Brien (personm.), you’ll find noticeable differences in the latest rostrum (snout) and you can antennal insertion in the people regarding A beneficial. pipitzi. The fresh females enjoys an equally rounded relatively evenly cylindrical rostrum having zero difference between diameter otherwise curvature during the antennal installation. Having said that, the brand new males possess an effective dorsal expansion in the antennal installation, as well as the rostrum is narrowed outside the insertion, strongly tilted ventrally, and you will dorsally hit bottom. This can be clear even yet in very small specimens. Almost every other types of this new genus, some much the same to look at, lack for example apparent men differences in the newest rostrum.

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