The Sustainable Control Technology Standard Of Grubs In Peanut Field

As the reform and open policy, especially after a guarantee-production household, one tremendous changes of the farmland cultivation management pattern occured is that underground harmful insect's preventing and controlling has a essential change , the depth ploughed reduces obviously, formalization underground harmful insect preventing and controlling chemistry processing reduce, primarily the peasant household agriculture operation, contempt to the underground harmful insect's, caused its occur aggravating gradually. The research which occurred seriously in view of the Luoyang area peanut fields grubs has carried out the sustainable control technology research. This research through the type investigation, the larva distribution, lures and kills experiment and the medicament processing experiment, initially we were clear about this local underground harmful insect's type, reasons of grubbed dominant species occur rule, and drawn up the field comprehensive program of public order measure. The main result includes:①The Luoyang area farmland grubs altogether has nine kinds of harm peanut , in which peanut fields dominant species has three kinds, respectively for Anomala corpulenta Motschulsky, Holotrichia parallela Motschulsky with Holotrichia oblita (Faldermann), accounts for the proportion respectively is 58.7 %, 33.8 %, 7.5 %. Mid-July beginning sees the low age larva to damage the fruit branch and the pod of peanut, the harm prime season for the mid-August to the harvest.②The host of grubs prosopon is complex, becomes one primary cause of this kind of harmful insect larva quantity increase and proliferation.③Tempts the prosopon through the different plant indicate that, Anomala corpulenta Motschulsky is highest to the privet taxis, next is kind of abutilon fibre, the peanut; Holotrichia parallela Motschulsky to abutilon fibre, the willow tree, the poplar tree, Lagerstroe miaindica taxis is highest; Holotrichia oblita (Faldermann) to the willow tree, privet, the Siberian elm, Lagerstroe miaindica and so on the taxes is high. Use the different base fertilizer to grub quantity have certain influence, animal excrement and so on the chicken, pig and the well-rotted compost straw stalk has not executed directly into the field, extremely easy to incur grubs occurrence.④Through the accumulation target examination proof, distribution of grubs in peanut field is assemble type. Carries on the regression analysis to the pertinency, the result is M*=44.2082+16.2190X (R=0.9635). The accumulation reason possible with to apply fertilizer the nonuniformity, it concerns to the plant accumulation as well as itself training ability. Indicated to the natural enemy research, the superiority natural enemy population of the peanut fields grub is a wasp, accounts for the natural enemy total quantity 61.7 %, next is fat sou, accounts for the total quantity 20.7 %. The natural control ability of these natural enemies had achieved 10%, had the tangible effect.⑤Use different fertilizer to grub population have obvious influence. The different base fertilizer influence experiment indicated that,plant killed rate of use plant ash and the chicken manure compare the comparison is equal, respectively are 70.86 % and 71.83 %, but plant killed rate of use goat ordure and the cow manures is more obvious lower than the comparison, respectively is 56.94 % and 64.28 %. effect of the host tempts the prosopon to collection is obvious.⑥The medicament efficacy in field result indicated that, the effect of imidacloprid is the best, achieves 88.7 %, next is acetamiprid and Lorsban,respectively is 68.1 % and 69.7 %. Simultaneously start the research of grubbed prosopon attractantand ,the research of effect in field and investigation of the natural enemy type, proposed the sustainable control technology standard of grubs in peanut field.